""ET TROJAN x64/Generic Red Team Activity CnC Response""

SID: 2052811

Revision: 1

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2024_05_21, deployment Perimeter, deployment SSLDecrypt, confidence Medium, signature_severity Major, tag c2, updated_at 2024_05_21, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol

Reference:

  • md5

  • 62bbc3b087c803260c0c63595cf872ee

Protocol: tcp

Source Network: $EXTERNAL_NET

Source Port: $HTTP_PORTS

Destination Network: $HOME_NET

Destination Port: any

Flow: established,to_client

Contents:

  • Value: "|0d 0a|x-azure-ref|3a 20|20"

  • Value: "er16cffdc5bnnsvlmnzkhcyecs00000002a000000002"

  • Value: "|0d 0a|X-Cache|3a 20|CONFIG_NOCACHE|0d 0a|"

Within:

PCRE:

Special Options:

  • http_header

  • http_header

  • fast_pattern

  • http_header

source